I have installed Advanced Find and Replace 4 on my Vista PC. Immediately after trying to start it Vista reports: "AFR.EXE has stoppe working" and no more messagre or explanation. The same AFR works fine on my XP PC.

I had Emailed you about this as well, but never heard back.... The same problem happens on AFR 4 under Windows Server 2008. As soom as you register the product, and launching it thereafter, the application crashes. My solution was to uninstall and reinstall with running unregistered, then the product runs fine, but I only have 3 days left on this machine. Turning off DEP might work for testing, but won't work out as a permanent fix.

So, did "Turning off DEP" work or not? Can AFR be started on Vista with DEP turned off on your computer?

On our Vista computers it works very fine even with DEP turned on.

Thus we have to define is it DEP-related problem or is it another problem. After that we will take the corresponding actions.

Note: it's clear that it might be insecure to turn DEP completely off.
But you know that there are two ways of DEP turning off:
1. You can turn off DEP completely (for all programs).
2. Or you can have DEP turned on (for all programs by default) but you can make an exception for another program. I.e. you can turn off DEP specifically for AFR.

To protect AFR we are using third-party protection module from another company. So they said that in these cases you should use it with deactivated DEP for AFR. Maybe they will solve it in future. So AFR will be able to run with activated DEP. Or maybe we will use another protection module (or write our own protection module).
Thus right now you have to disable DEP in such cases.